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MSD 7AL-2 Plus User Manual

MSD 7AL-2 Plus
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Note: Solid Core spark plug wires cannot be used with an MSD Ignition.
Note: An MSD cannot be used on vehicles with CD ignitions or distributorless ignition systems.
Parts Included:
1 - MSD 7AL-2 Plus Ignition 1 - White Wire
1 - Mag Pickup Extension Harness, PN 8860 1 - Red Wire
1 - Mag Pickup Adapter Harness, PN 8859 4 - Vibration Mounts and Hardware
1 - Coil Harness, PN 8863 4 - RPM Modules: 3K, 7K, 8K and 9K
FEATURES
RPM LIMITERS
The 7AL-2 Plus Ignition is equipped with a 2-step rev control. The Ignition will accept two rpm
modules so two different rev limits can be set. One rev limit can be used for overrev protection while
the second limit can be activated on the starting line for a lower rpm limit to assist in staging and
for consistent holeshots. When 12 volts are applied to the 2-step terminal (2’S’), Module 1 is active.
Module 2 is active when there is no 12 volts.
CYLINDER SELECT
This ignition can be used on 2, 4, 6 (even-re) or 8-cylinder engines. The ignition is set for 8-cylinder
operation. To program the unit for other engines, remove the one screw that holds the cover to reveal
three wire loops (Figure 1). Cutting a wire loop determines the cylinder selection.
SPARK LED
When the coil res, current is sensed and this
LED will ash. This conrms that the ignition
has received a trigger signal and that the coil
and ignition are working properly. (If the coil is
not connected, the LED will not ash.) When the
engine is running, it will appear solid.
Cylinders Loops to Cut
8 None
6 One
4 Two
2 Three
Cut loops
Remove cap
WARNING: Before installing the MSD Distributor, disconnect the battery cables. When disconnecting
the battery cables, always remove the Negative (-) cable rst and install it last.
Figure 1 Cylinder Programming.
MSD 7AL-2 Plus Ignition
PN 7222/72223
MSD WWW.MSDPERFORMANCE.COM • (915) 857-5200 • FAX (915) 857-3344
ONLINE PRODUCT REGISTRATION: Register your MSD product online. Registering your
product will help if there is ever a warranty issue with your product and helps the MSD R&D
team create new products that you ask for! Go to www.msdperformance.com/registration.

Questions and Answers:

MSD 7AL-2 Plus Specifications

General IconGeneral
BrandMSD
Model7AL-2 Plus
CategoryAutomobile Accessories
LanguageEnglish

Summary

CORE FEATURES

RPM LIMITERS FUNCTIONALITY

Describes the 2-step rev control feature with two RPM modules.

CYLINDER SELECTION PROGRAMMING

Explains how to program the unit for 2, 4, 6, or 8-cylinder engines.

SPARK LED INDICATOR BEHAVIOR

Details the function of the LED that indicates coil firing and ignition status.

GENERAL SYSTEM INFORMATION

BATTERY POWER REQUIREMENTS

Details power requirements and compatibility with different battery voltages.

COMPATIBLE IGNITION COILS

Lists compatible MSD and aftermarket ignition coils for various applications.

TACHOMETER INTERFACE

Explains the Tach Output Terminal and potential tachometer compatibility issues.

SPARK PLUG WIRE REQUIREMENTS

Emphasizes the importance of quality spark plug wires and proper routing.

MISCELLANEOUS INSTALLATION NOTES

UNIT SEALING ADVICE

Advises against sealing the MSD unit due to its conformal coating and drainage needs.

WELDING SAFETY GUIDELINES

Recommends disconnecting MSD power cables when welding to prevent damage.

DISTRIBUTOR CAP & ROTOR RECOMMENDATION

Recommends replacing the distributor cap and rotor for optimal performance.

INITIAL SPARK OCCURRENCE

Explains the possibility of a momentary spark when the ignition key is turned on.

MOUNTING INSTRUCTIONS

MOUNTING LOCATION AND DRILLING

Guides on selecting a mounting location and drilling for installation.

WIRING GUIDE

GENERAL WIRING PRACTICES

Covers wire length, soldering, and general connection practices.

WIRE FUNCTIONS AND TERMINAL CONNECTIONS

Details the purpose and connection points for each wire of the MSD ignition unit.

WIRE ROUTING AND MANAGEMENT

ROUTING AWAY FROM HEAT/INTERFERENCE

Provides instructions on routing wires away from heat and interference sources.

PRE-START OPERATIONAL CHECKLIST

Lists essential checks before starting the engine for proper ignition operation.

SYSTEM TROUBLESHOOTING

TROUBLESHOOTING COMMON PROBLEMS

Discusses common problems and provides contact info for customer support.

TACHOMETER AND FUEL ADAPTERS

TACHOMETER COMPATIBILITY AND ADAPTERS

TACHOMETER COMPATIBILITY LIST

Lists tachometers and their compatibility with MSD ignition, noting adapter needs.

MSD TACHOMETER ADAPTERS EXPLANATION

Explains the two types of MSD Tach Adapters (PN 8920 and PN 8910) and their uses.

ENGINE RUN-ON ISSUE RESOLUTION

RESOLVING ENGINE RUN-ON WITH DIODE

Provides a solution for engine run-on issues using a supplied diode.

DIAGNOSING MISSES AND HESITATIONS

IGNITION COMPONENT INSPECTION STEPS

Lists checks for plug wires, coil connections, and battery charge to diagnose issues.

USING LED FOR DIAGNOSIS

Explains how the ignition LED aids in diagnosing issues like coil or trigger problems.

SPARK CHECK PROCEDURES

WHITE WIRE TRIGGER SPARK TEST

Step-by-step guide to check for spark when using the white wire trigger.

MAGNETIC PICKUP TRIGGER SPARK TEST

Step-by-step guide to check for spark when using the magnetic pickup trigger.

TROUBLESHOOTING NO SPARK CONDITIONS

Lists common causes and steps to diagnose a complete lack of spark.

INSTALLATION: POINTS/AMPLIFIER IGNITION

WIRING DIAGRAM FOR POINTS/AMPLIFIER

Illustrates the wiring connections for points or amplifier style ignition systems.

INSTALLATION: MSD DISTRIBUTOR/CRANK TRIGGER

WIRING DIAGRAM FOR MSD DISTRIBUTOR/CRANK TRIGGER

Illustrates the wiring connections for MSD distributors and crank triggers.

INSTALLATION: MSD READY-TO-RUN DISTRIBUTOR

WIRING DIAGRAM FOR READY-TO-RUN DISTRIBUTOR

Shows the wiring diagram for installing the MSD with a Ready-to-Run distributor.

INSTALLATION: MSD TIMING CONTROL

WIRING DIAGRAM FOR MSD TIMING CONTROL

Illustrates the wiring diagram for using the MSD with an MSD Timing Control unit.

GM IGNITIONS: WIRING HARNESS INSTALLATION

GM HARNESS APPLICATIONS (PN 8876/8877)

Details harness compatibility for dual connector coils and 1996-on GM vehicles.

FORD IGNITIONS: TFI HARNESS INSTALLATION

FORD TFI HARNESS (PN 8874)

Describes the wiring for a Ford TFI system using PN 8874 harness.

GM IGNITIONS: WIRING WITH TIMING CONTROL

HARNESS & TIMING CONTROL INTEGRATION

Shows wiring for GM ignitions with harnesses and timing controls.

GM IGNITIONS: LARGE CAP HEI DISTRIBUTORS

HEI DISTRIBUTOR MODULE IDENTIFICATION

Guides on identifying GM HEI distributor module types (4, 5, 7-pin) for correct diagrams.

GM IGNITIONS: HEI 4-PIN MODULE WIRING

HEI 4-PIN: MAGNETIC PICKUP TRIGGER

Details wiring for GM HEI 4-pin modules using a magnetic pickup trigger.

GM IGNITIONS: HEI 5/7-PIN MODULE WIRING

HEI 5/7-PIN: AMPLIFIER TRIGGER

Details wiring for GM HEI 5 or 7-pin modules using an amplifier trigger.

FORD IGNITIONS: DURASPARK WIRING

DURASPARK: MAGNETIC PICKUP TRIGGER

Illustrates wiring for Ford DuraSpark systems using a magnetic pickup trigger.

HONDA IGNITIONS: INTERNAL COIL WIRING

HONDA 4-CYLINDER NOTE

Provides a specific note for 4-cylinder Honda applications regarding cylinder select.

CHRYSLER IGNITIONS: ELECTRONIC IGNITION WIRING

CHRYSLER: MAGNETIC PICKUP TRIGGER

Shows wiring for Chrysler electronic ignitions using a magnetic pickup trigger.

AFTERMARKET: MALLORY UNILITE/9000 SERIES WIRING

MALLORY: POINTS TRIGGER SETUP

Details wiring for Mallory Unilite or 9000 Series using a points trigger.

AFTERMARKET: ACCEL BEI DISTRIBUTOR WIRING

ACCEL BEI: MAGNETIC PICKUP SETUP

Illustrates wiring for Accel BEI distributors using a magnetic pickup.

SERVICE AND WARRANTY INFORMATION

WARRANTY SERVICE PROCEDURE

Outlines the process for obtaining warranty repair service for MSD components.

LIMITED WARRANTY TERMS AND CONDITIONS

Details the one-year limited warranty covering defects in material and workmanship.

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